LIGHTING GURUS! Help me!

[Xtasia]

This weekend is the one. I’m going to add Actinics to my MH fixture…

I’m wondering if anyone out there who has seen my Lights (TomR, Tigger, or SeaHorse, ETC) could give me some advice on what exactly I need to make this happen. I currently run a ballast (looks like http://www.saltycritter.com/lighting...fo_ballast.htm the one on the right.) with Ushio 10k 250w MH bulbs… 3 Foot fixture (looks like http://www.jlaquatics.com/images/halide/hood-main.jpgb) with 2 metal halide bulbs in the middle and two extra sets of end caps.

Bought it second hand and purposely choose not to pay attention to lighting talk as it confuses me .

Help…!